Home / 21,078.36-31,619.43-8,599.32

Finding the Fourth Proportional to 21,078.36, 31,619.43 and 8,599.32

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Solution

The fourth proportional to 21,078.36, 31,619.43 and 8,599.32 is: 12,899.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.36 : 31,619.43 = 8,599.32 : x
  2. Step 2: Convert to fraction form
    21,078.36/31,619.43 = 8,599.32/x
  3. Step 3: Cross multiply
    21,078.36x = 31,619.43 × 8,599.32
  4. Step 4: Simplify right side
    21,078.36x = 271,905,596.79
  5. Step 5: Solve for x
    x = 271,905,596.79/21,078.36
  6. Step 6: Final answer
    x = 12,899.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.